Development of Magnesia Spinel brick using Pre-synthesized and in-situ spinel

Kumar , Amarjeet (2014) Development of Magnesia Spinel brick using Pre-synthesized and in-situ spinel. BTech thesis.

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Abstract

This Project is about designing the Development of magnesia-spinel brick using pre-synthesized and in-situ spinel. The spinel’s are a class of minerals of general formulation A 2+B3+2O2-4 which crystallize in the face centered cubic (isometric) crystal system, with the oxide anions arranged in a cubic close-packed lattice. The cation A fills the tetrahedral sites and cation B fills the octahedral sites. A and B are divalent and trivalent cations respectively. Pre-synthesized spinel refractory is the refractory where the spinel material is synthesized separately and is then added into the brick composition. Where as in-situ spinel refractory is the refractory where the spinel forms inside the brick during the firing stages at higher temperatures. The brick compositions of pre synthesized spinel and in-situ spinel were taken and pressed to form bricks. The bricks upon sintering at 1550C and 1600C led to increase in density. The in-situ spinel brick was found to have higher BD, lower porosity and higher shrinkage as compared to the pre synthesized spinel refractory brick.

Item Type:Thesis (BTech)
Uncontrolled Keywords:Spinel; Presynthesized; insitu; sintering; refractory brick;
Subjects:Engineering and Technology > Ceramic Engnieering > Refractories
Divisions: Engineering and Technology > Department of Ceramic Engineering
ID Code:6058
Deposited By:Hemanta Biswal
Deposited On:25 Aug 2014 19:56
Last Modified:25 Aug 2014 19:56
Supervisor(s):Sarkar, R

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